Eckles, Clarence H.. Dairy Cattle and Milk Production / Textual Documents Clarence H.Eckles. - 4th ed. / - New York : The Macmillan Company , 1950. - vi,559p. : ill ; 22cm . Index Subjects--Index Terms: Milk Production Dairy Cattle G-Technology G-Technology Dewey Class. No.: 637.131 / Ec 57 D